Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08G-064/10
C08G-064/00
C07C-051/255
C07C-051/16
출원번호
UP-0076839
(2005-03-10)
등록번호
US-7601795
(2009-10-28)
발명자
/ 주소
Parker, Kenny Randolph
Lin, Robert
Gibson, Philip Edward
출원인 / 주소
Eastman Chemical Company
대리인 / 주소
Owen, Steven A.
인용정보
피인용 횟수 :
0인용 특허 :
57
초록▼
The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic acid/ethy
The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic acid/ethylene glycol mixture suitable as a starting material for polyester or co-polyester production is obtained from a slurry or cake terephthalic acid product without isolation of a substantially dry terephthalic acid solid.
대표청구항▼
We claim: 1. A process for producing a carboxylic acid/diol mixture, said process comprising: (a) removing in a liquor exchange zone impurities from a carboxylic acid slurry to form a water-wet carboxylic acid cake, a mother liquor stream, a solvent mother liquor stream, and a solvent/water byprodu
We claim: 1. A process for producing a carboxylic acid/diol mixture, said process comprising: (a) removing in a liquor exchange zone impurities from a carboxylic acid slurry to form a water-wet carboxylic acid cake, a mother liquor stream, a solvent mother liquor stream, and a solvent/water byproduct liquor stream; wherein said liquor exchange zone comprises at least one solid liquid separation device operated at a temperature of 50° C. to 200° C.; (b) routing said water-wet carboxylic acid cake to a vapor seal zone; and (c) adding at least one diol to said water-wet carboxylic acid cake in a carboxylic acid/diol mixing zone to form said carboxylic acid/diol mixture; wherein said diol displaces water from said water-wet carboxylic acid cake; and wherein said carboxylic acid/diol mixture is produced without the isolation of a substantially dry carboxylic acid solid; and where said vapor seal zone prevents said diol from entering any zone proceeding said vapor seal zone. 2. A process according to claim 1 wherein said carboxylic acid is selected from a group consisting of terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, trimellitic acid, and mixtures thereof. 3. A process according to claim 1 or 2 wherein said diol is selected from the group consisting of ethylene glycol, diethylene glycol, n-butylene glycol, i-butylene glycol, n-propylene glycol, 1,4 butanediol, cyclohexanedimethanol, and mixtures thereof. 4. A process according to claim 1 wherein said carboxylic acid/diol mixing zone comprises at least one device selected from the group consisting of an agitated vessel, a static mixer, and a screw conveyor. 5. A process according to claim 1 wherein said carboxylic acid is terephthalic acid and said diol is ethylene glycol. 6. A process for producing a carboxylic acid/diol mixture, said process comprising: (a) removing in a solvent liquor exchange zone impurities from a carboxylic acid slurry to form a carboxylic acid cake with solvent, a mother liquor stream, and a solvent mother liquor stream; wherein said liquor exchange zone comprises at least one solid liquid separation device operated at a temperature of 50° C. to 200° C.; (b) adding water in a water wash zone to said carboxylic cake with solvent to produce a water-wet carboxylic acid cake and a solvent/water by product liquor stream; (c) routing said water-wet carboxylic acid cake to a vapor seal zone; and (d) adding at least one diol to said water-wet carboxylic acid cake in a carboxylic acid/diol mixing zone to form said carboxylic acid/diol mixture; wherein said diol displaces water from said water-wet carboxylic acid cake; and wherein said carboxylic acid/diol mixture is produced without the isolation of a substantially dry carboxylic acid solid; and where said vapor seal zone prevents said diol from entering any zone proceeding said vapor seal zone. 7. A process according to claim 6 wherein said carboxylic acid is selected from a group consisting of terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, trimellitic acid and mixtures thereof. 8. A process according to claim 6 or 7 wherein said diol is selected from the group consisting of ethylene glycol, diethylene glycol, n-butylene glycol, i-butylene glycol, n-propylene glycol, 1,4 butanediol, cyclohexanedimethanol, and mixtures thereof. 9. A process according to claim 6 wherein said carboxylic acid/diol mixing zone comprises at least one device selected from the group consisting of an agitated vessel, a static mixer, and a screw conveyor. 10. A process according to claim 6 wherein said carboxylic acid is terephthalic acid and said diol is ethylene glycol. 11. A process for producing a carboxylic acid/diol mixture, said process comprising: (a) removing in a solid-liquid separation zone impurities from a carboxylic acid slurry to form a slurry or cake carboxylic acid product and a mother liquor stream; wherein said liquor exchange zone comprises at least one solid liquid separation device operated at a temperature of 50° C. to 200° C.; (b) removing in a solvent-water liquor exchange zone residual impurities from said slurry or cake carboxylic acid product to form a water-wet carboxylic acid cake, a solvent mother liquor stream, and a solvent/water byproduct liquor stream; (c) routing said water-wet carboxylic acid cake to a vapor seal zone; and (d) adding at least one diol to said water-wet carboxylic acid cake in a carboxylic acid/diol mixing zone to form said carboxylic acid/diol mixture; wherein said diol displaces water from said water-wet carboxylic acid cake; and wherein said carboxylic acid/diol mixture is produced without the isolation of a substantially dry carboxylic acid solid; and where said vapor seal zone prevents said diol from entering any zone proceeding said vapor seal zone. 12. A process according to claim 11 wherein said carboxylic acid is selected from a group consisting of terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, trimellitic acid and mixtures thereof. 13. A process according to claim 11 or 12 wherein said diol is selected from the group consisting of ethylene glycol, diethylene glycol, n-butylene glycol, i-butylene glycol, n-propylene glycol, 1,4 butanediol, cyclohexanedimethanol, and mixtures thereof. 14. A process according to claim 11 wherein said carboxylic acid/diol mixing zone comprises at least one device selected from the group consisting of an agitated vessel, a static mixer, and a screw conveyor. 15. A process according to claim 11 wherein said carboxylic acid is terephthalic acid and said diol is ethylene glycol. 16. A process for producing a carboxylic acid/diol mixture, said process comprising the following steps: (a) removing a solvent from a slurry or cake carboxylic acid product in a solvent-water liquor exchange zone; wherein a portion of the solvent in said slurry or cake carboxylic acid product is replaced with water to form a water-wet carboxylic acid cake; (b) routing said water-wet carboxylic acid cake to a vapor seal zone; and (c) adding at least one diol to said water-wet carboxylic acid cake in a carboxylic acid/diol mixing zone to form said carboxylic acid/diol mixture; wherein said diol displaces water from said water-wet carboxylic acid cake; and wherein said carboxylic acid/diol mixture is produced without the isolation of a substantially dry carboxylic acid solid; and where said vapor seal zone prevents said diol from entering any zone proceeding said vapor seal zone; wherein said carboxylic acid/diol mixing zone comprises at least one device selected from the group consisting of an agitated vessel, a static mixer, and a screw conveyor. 17. A process according to claim 16 wherein said carboxylic acid is selected from a group consisting of terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, trimellitic and mixtures thereof. 18. A process according to claim 16 or 17 wherein said diol is selected from the group consisting of ethylene glycol, diethylene glycol, n-butylene glycol, i-butylene glycol, n-propylene glycol, 1,4 butanediol, cyclohexanedimethanol, and mixtures thereof. 19. A process for producing a terephthalic acid/diol mixture, said process comprising: (a) removing in a solvent wash zone residual impurities from a slurry or cake terephthalic acid product to form a terephthalic acid cake with acetic acid; wherein said liquor exchange zone comprises at least one solid liquid separation device operated at a temperature of 50° C. to 200° C.; (b) removing a portion of a solvent in a water wash zone from said terephthalic acid cake with acetic acid to form a water-wet terephthalic acid cake; and (c) routing said water-wet terephthalic acid cake to a vapor seal zone; and (d) adding at least one diol to said water-wet terephthalic acid cake in a carboxylic acid/diol mixing zone to form said terephthalic acid/diol mixture; wherein said diol displaces water from said water-wet carboxylic acid cake; and wherein said carboxylic acid/diol mixture is produced without the isolation of a substantially dry carboxylic acid solid; and where said vapor seal zone prevents said diol from entering any zone proceeding said vapor seal zone. 20. A process according to claim 19 wherein said solvent wash zone comprises a solid-liquid separation device that is operated at a temperature between about 40° C. to about 155° C. 21. A process according to claim 20 wherein said water wash zone comprises a solid-liquid separation device that is operated at a temperature between about 40° C. to about 155° C. 22. A process according to claim 19 or 20 wherein said adding occurs at a temperature between about 40° C. to about 290° C. 23. A process according to claim 19 wherein said diol is selected from the group consisting of ethylene glycol, diethylene glycol, n-butylene glycol, i-butylene glycol, n-propylene glycol, 1,4 butanediol, cyclohexanedimethanol, and mixtures thereof. 24. A process according to claim 19 wherein said diol is ethylene glycol. 25. A process according to claim 19 wherein said carboxylic acid/diol mixing zone comprises a device selected from the group consisting of an agitated vessel, a static mixer, and a screw conveyor. 26. A process for producing a terephthalic acid/diol mixture, said process comprising: (a) removing a solvent from a slurry or cake terephthalic acid product in a solvent-water liquor exchange zone; wherein a portion of the solvent in said slurry or cake terephthalic acid product is replaced with water to form a water-wet terephthalic acid cake; wherein said liquor exchange zone comprises at least one solid liquid separation device operated at a temperature of 50° C. to 200° C.; (b) routing said water-wet terephthalic acid cake to a vapor seal zone; and (c) adding at least one diol to said water-wet terephthalic acid cake in a carboxylic acid/diol mixing zone to form said terephthalic acid/diol mixture; wherein said diol displaces water from said water-wet terephthalic acid cake; and wherein said terephthalic acid/diol mixture is produced without the isolation of a substantially dry terephthalic acid solid; and where said vapor seal zone prevents said diol from entering any zone proceeding said vapor seal zone. 27. A process according to claim 26 wherein said solvent liquor exchange zone comprises a solid-liquid separation device that is operated at a temperature between about 40° C. to about 155° C. 28. A process according to claim 26 wherein said adding occurs at a temperature between about 40° C. and 290° C. 29. A process according to claim 26 wherein said diol is selected from the group consisting of ethylene glycol, diethylene glycol, n-butylene glycol, i-butylene glycol, n-propylene glycol, 1,4 butanediol, cyclohexanedimethanol, and mixtures thereof. 30. A process according to claim 26 wherein said diol is ethylene glycol.
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